Charging systems for contact chargers and related methods

A charger for a rechargeable hearing device, the charger comprising:

• a charging cavity configured to receive a hearing device;
• a pair of contacts exposed to the charging cavity, wherein the contacts are electrically coupled to the hearing device to provide a charging current when the hearing device is received in the charging cavity;
• and
• a controller comprising a processor and a memory, the processor configured to:
• store a hearing device identifier in the memory associated with a last charge state;
• retrieve a hearing device identifier from the hearing device when received in the charging cavity;
• determine whether the retrieved hearing device identifier matches the stored hearing device identifier in the memory;
• and
• provide an indication of a current charge state of the hearing device in response to the retrieved hearing device identifier matching the stored hearing device identifier in the memory.

A charger for a rechargeable hearing device, the charger comprising:

• a charging cavity configured to receive a hearing device;
• a pair of contacts exposed to the charging cavity, wherein the contacts are electrically coupled to the hearing device to provide a charging current when the hearing device is received in the charging cavity;
• and
• a controller comprising a processor, the processor configured to:
• detect a hearing device in the charging cavity;
• send an electrical pulse through one of the contacts;
• and
• determine a polarity for charging the hearing device in response to whether the pulse was received by the other contact.